// -*- mode:C++ -*-

#include<math.h>

#include<hugo/list_graph.h>

#include<hugo/smart_graph.h>

#include<hugo/dijkstra.h>

#include<../work/jacint/max_flow_no_stack.h>

#include"bench_tools.h"

using namespace std;

using namespace hugo;

template<class Graph>

void addHiperCube(Graph &G,int dim,vector<typename Graph::Node> &nodes)

{

  GRAPH_TYPEDEF_FACTORY(Graph);

  vector<int> bits(dim+1);

  bits[0]=1;

  for(int i=1;i<=dim;i++) bits[i]=2*bits[i-1];

  for(int i=0;i<bits[dim];i++) {

    nodes.push_back(G.addNode());

    for(int j=0;j<dim;j++) if(i&bits[j]) G.addEdge(nodes[i-bits[j]],nodes[i]);

  }

}

template<class Graph>

void addBiDirHiperCube(Graph &G,int dim,vector<typename Graph::Node> &nodes)

{

  GRAPH_TYPEDEF_FACTORY(Graph);

  vector<int> bits(dim+1);

  bits[0]=1;

  for(int i=1;i<=dim;i++) bits[i]=2*bits[i-1];

  for(int i=0;i<bits[dim];i++) {

    nodes.push_back(G.addNode());

    for(int j=0;j<dim;j++) if(i&bits[j]) {

      G.addEdge(nodes[i-bits[j]],nodes[i]);

      G.addEdge(nodes[i],nodes[i-bits[j]]);

    }

  }

}

inline int numOfOnes(int n,int dim)

{

  int s=0;

  for(int i=0;i<dim;i++) {

    s+=n%2;

    n>>=1;

  }

  return s;

}

inline int numOfZeros(int n,int dim)

{

  int s=dim;

  for(int i=0;i<dim;i++) {

    s-=n&1;

    n>>=1;

  }

  return s;

}

int main(int argc, char *argv[])

{

  //  typedef ListGraph Graph;

  typedef SmartGraph Graph;

  ///\bug GRAPH_TYPEDEF_FACTORY(Graph);

  GRAPH_TYPEDEF_FACTORY_NOTYPENAME(Graph);

  Graph G;

  Timer T;

  if(argc!=2) {

    cout << "Usage: " << argv[0] << " dim\n";

    return 1;

  }

  int dim=atoi(argv[1]);

//   cout << "Creating Hipercube ("<< (1<<dim) << " nodes, "

//        << dim*(1<<dim) << " edges):";

  T.reset();

  vector<Node> nodes;

  addBiDirHiperCube(G,dim,nodes);

  PrintTime("GENGRAPH",T);

  T.reset();

  Graph::EdgeMap<int> map(G);

  {

    Primes P;

    for(int i=0;i<dim*(1<<dim);i++) P();

    //  for(EdgeIt e(G);G.valid(e);G.next(e)) map[e]=P();

    for(int i=0;i<dim*(1<<dim);i++)

      //    map[Edge(((long long int)(i)*2987)%(dim*(1<<dim)))]=P();

      map[Edge(((long long int)(i)*93505)%(dim*(1<<dim)))]=P();

//     for(int i=0;i<(1<<dim);i++) {

//       int mul= (1<<(numOfZeros(i,dim)/4));

//       for(OutEdgeIt e(G,nodes[i]);G.valid(e);G.next(e))

// 	map[e]*=mul;

//     }

  }

  PrintTime("GENLENGTHS",T);

  T.reset();

  {

    Dijkstra<Graph> Dij(G,map);

    Dij.run(nodes[0]);

  }

  PrintTime("DIJKSTRA",T);

  T.reset();

  {

   Graph::EdgeMap<int> flow(G);

    MaxFlowNoStack<Graph,int> MF(G,nodes[0],nodes[1<<dim-1],map,flow);

    MF.run(MF.NO_FLOW);

  }

  PrintTime("PREFLOW",T);

}